<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
	.KEYW {color: #933;}
	.COMM {color: #bbb; font-style: italic;}
	.NUMB {color: #393;}
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	.line {border-right: 1px dotted #666; color: #666; font-style: normal;}
	</style></head><body><pre><span class='line'>  1</span> <span class="COMM">/**
<span class='line'>  2</span>  * Hilo
<span class='line'>  3</span>  * Copyright 2015 alibaba.com
<span class='line'>  4</span>  * Licensed under the MIT License
<span class='line'>  5</span>  */</span><span class="WHIT">
<span class='line'>  6</span> 
<span class='line'>  7</span> </span><span class="COMM">/**
<span class='line'>  8</span>  * @class Ticker is a Timer. It can run the code at specified framerate.
<span class='line'>  9</span>  * @param {Number} fps The fps of ticker.Default is 60.
<span class='line'> 10</span>  * @module hilo/util/Ticker
<span class='line'> 11</span>  * @requires hilo/core/Class
<span class='line'> 12</span>  * @requires hilo/util/browser
<span class='line'> 13</span>  */</span><span class="WHIT">
<span class='line'> 14</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">Ticker</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Class.create</span><span class="PUNC">(</span><span class="COMM">/** @lends Ticker.prototype */</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 15</span> </span><span class="WHIT">    </span><span class="NAME">constructor</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">fps</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 16</span> </span><span class="WHIT">        </span><span class="NAME">this._targetFPS</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">fps</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NUMB">60</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 17</span> </span><span class="WHIT">        </span><span class="NAME">this._interval</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">1000</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="NAME">this._targetFPS</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 18</span> </span><span class="WHIT">        </span><span class="NAME">this._tickers</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 19</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 20</span> 
<span class='line'> 21</span> </span><span class="WHIT">    </span><span class="NAME">_paused</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 22</span> </span><span class="WHIT">    </span><span class="NAME">_targetFPS</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 23</span> </span><span class="WHIT">    </span><span class="NAME">_interval</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 24</span> </span><span class="WHIT">    </span><span class="NAME">_intervalId</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 25</span> </span><span class="WHIT">    </span><span class="NAME">_tickers</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 26</span> </span><span class="WHIT">    </span><span class="NAME">_lastTime</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 27</span> </span><span class="WHIT">    </span><span class="NAME">_tickCount</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 28</span> </span><span class="WHIT">    </span><span class="NAME">_tickTime</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 29</span> </span><span class="WHIT">    </span><span class="NAME">_measuredFPS</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 30</span> 
<span class='line'> 31</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 32</span>      * Start the ticker.
<span class='line'> 33</span>      * @param {Boolean} userRAF Whether or not use requestAnimationFrame, default is true.
<span class='line'> 34</span>      */</span><span class="WHIT">
<span class='line'> 35</span> </span><span class="WHIT">    </span><span class="NAME">start</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">useRAF</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 36</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">useRAF</span><span class="WHIT"> </span><span class="PUNC">===</span><span class="WHIT"> </span><span class="NAME">undefined</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 37</span> </span><span class="WHIT">            </span><span class="NAME">useRAF</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 38</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 39</span> </span><span class="WHIT">        
<span class='line'> 40</span>         </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">this._intervalId</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 41</span> </span><span class="WHIT">        </span><span class="NAME">this._lastTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 42</span> 
<span class='line'> 43</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">self</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">interval</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this._interval</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 44</span> </span><span class="WHIT">            </span><span class="NAME">raf</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">window.requestAnimationFrame</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT">
<span class='line'> 45</span> </span><span class="WHIT">                  </span><span class="NAME">window</span><span class="PUNC">[</span><span class="NAME">browser.jsVendor</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'RequestAnimationFrame'</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 46</span> 
<span class='line'> 47</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">runLoop</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 48</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">useRAF</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">raf</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">interval</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NUMB">17</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 49</span> </span><span class="WHIT">            </span><span class="NAME">this._useRAF</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 50</span> </span><span class="WHIT">            </span><span class="NAME">runLoop</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 51</span> </span><span class="WHIT">                </span><span class="NAME">self._intervalId</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">raf</span><span class="PUNC">(</span><span class="NAME">runLoop</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 52</span> </span><span class="WHIT">                </span><span class="NAME">self._tick</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 53</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 54</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 55</span> </span><span class="WHIT">            </span><span class="NAME">runLoop</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 56</span> </span><span class="WHIT">                </span><span class="NAME">self._intervalId</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">setTimeout</span><span class="PUNC">(</span><span class="NAME">runLoop</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">interval</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 57</span> </span><span class="WHIT">                </span><span class="NAME">self._tick</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 58</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 59</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 60</span> 
<span class='line'> 61</span> </span><span class="WHIT">        </span><span class="NAME">this._paused</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 62</span> </span><span class="WHIT">        </span><span class="NAME">runLoop</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 63</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 64</span> 
<span class='line'> 65</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 66</span>      * Stop the ticker.
<span class='line'> 67</span>      */</span><span class="WHIT">
<span class='line'> 68</span> </span><span class="WHIT">    </span><span class="NAME">stop</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 69</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">this._useRAF</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 70</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">cancelRAF</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">window.cancelAnimationFrame</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT">
<span class='line'> 71</span> </span><span class="WHIT">                  </span><span class="NAME">window</span><span class="PUNC">[</span><span class="NAME">browser.jsVendor</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'CancelAnimationFrame'</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 72</span> </span><span class="WHIT">            </span><span class="NAME">cancelRAF</span><span class="PUNC">(</span><span class="NAME">this._intervalId</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 73</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 74</span> </span><span class="WHIT">        </span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 75</span> </span><span class="WHIT">            </span><span class="NAME">clearTimeout</span><span class="PUNC">(</span><span class="NAME">this._intervalId</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 76</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 77</span> </span><span class="WHIT">        </span><span class="NAME">this._intervalId</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 78</span> </span><span class="WHIT">        </span><span class="NAME">this._lastTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 79</span> </span><span class="WHIT">        </span><span class="NAME">this._paused</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 80</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 81</span> 
<span class='line'> 82</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 83</span>      * Pause the ticker.
<span class='line'> 84</span>      */</span><span class="WHIT">
<span class='line'> 85</span> </span><span class="WHIT">    </span><span class="NAME">pause</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 86</span> </span><span class="WHIT">        </span><span class="NAME">this._paused</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 87</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 88</span> 
<span class='line'> 89</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 90</span>      * Resume the ticker.
<span class='line'> 91</span>      */</span><span class="WHIT">
<span class='line'> 92</span> </span><span class="WHIT">    </span><span class="NAME">resume</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 93</span> </span><span class="WHIT">        </span><span class="NAME">this._paused</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 94</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 95</span> 
<span class='line'> 96</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 97</span>      * @private
<span class='line'> 98</span>      */</span><span class="WHIT">
<span class='line'> 99</span> </span><span class="WHIT">    </span><span class="NAME">_tick</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>100</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">this._paused</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>101</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">startTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>102</span> </span><span class="WHIT">            </span><span class="NAME">deltaTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">startTime</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">this._lastTime</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>103</span> </span><span class="WHIT">            </span><span class="NAME">tickers</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this._tickers</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>104</span> 
<span class='line'>105</span> </span><span class="WHIT">        </span><span class="COMM">//calculates the real fps</span><span class="WHIT">
<span class='line'>106</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">++</span><span class="NAME">this._tickCount</span><span class="WHIT"> </span><span class="PUNC">>=</span><span class="WHIT"> </span><span class="NAME">this._targetFPS</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>107</span> </span><span class="WHIT">            </span><span class="NAME">this._measuredFPS</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">1000</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">this._tickTime</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="NAME">this._tickCount</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">0.5</span><span class="WHIT"> </span><span class="PUNC">>></span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>108</span> </span><span class="WHIT">            </span><span class="NAME">this._tickCount</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>109</span> </span><span class="WHIT">            </span><span class="NAME">this._tickTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>110</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>111</span> </span><span class="WHIT">            </span><span class="NAME">this._tickTime</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">startTime</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">this._lastTime</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>112</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>113</span> </span><span class="WHIT">        </span><span class="NAME">this._lastTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">startTime</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>114</span> 
<span class='line'>115</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tickersCopy</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">tickers.slice</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>116</span> </span><span class="WHIT">        </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">len</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">tickersCopy.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">len</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">++</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>117</span> </span><span class="WHIT">            </span><span class="NAME">tickersCopy</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">.</span><span class="NAME">tick</span><span class="PUNC">(</span><span class="NAME">deltaTime</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>118</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>119</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>120</span> 
<span class='line'>121</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>122</span>      * Get the fps.
<span class='line'>123</span>      */</span><span class="WHIT">
<span class='line'>124</span> </span><span class="WHIT">    </span><span class="NAME">getMeasuredFPS</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>125</span> </span><span class="WHIT">        </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">Math.min</span><span class="PUNC">(</span><span class="NAME">this._measuredFPS</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">this._targetFPS</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>126</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>127</span> 
<span class='line'>128</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>129</span>      * Add tickObject. The tickObject must implement the tick method.
<span class='line'>130</span>      * @param {Object} tickObject The tickObject to add.It must implement the tick method.
<span class='line'>131</span>      */</span><span class="WHIT">
<span class='line'>132</span> </span><span class="WHIT">    </span><span class="NAME">addTick</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">tickObject</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>133</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">tickObject</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="KEYW">typeof</span><span class="PUNC">(</span><span class="NAME">tickObject.tick</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">!=</span><span class="WHIT"> </span><span class="STRN">'function'</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>134</span> </span><span class="WHIT">            </span><span class="KEYW">throw</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Error</span><span class="PUNC">(</span><span class="STRN">'Ticker: The tick object must implement the tick method.'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>135</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>136</span> </span><span class="WHIT">        </span><span class="NAME">this._tickers.push</span><span class="PUNC">(</span><span class="NAME">tickObject</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>137</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>138</span> 
<span class='line'>139</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>140</span>      * Remove the tickObject
<span class='line'>141</span>      * @param {Object} tickObject The tickObject to remove.
<span class='line'>142</span>      */</span><span class="WHIT">
<span class='line'>143</span> </span><span class="WHIT">    </span><span class="NAME">removeTick</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">tickObject</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>144</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tickers</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this._tickers</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>145</span> </span><span class="WHIT">            </span><span class="NAME">index</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">tickers.indexOf</span><span class="PUNC">(</span><span class="NAME">tickObject</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>146</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">index</span><span class="WHIT"> </span><span class="PUNC">>=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>147</span> </span><span class="WHIT">            </span><span class="NAME">tickers.splice</span><span class="PUNC">(</span><span class="NAME">index</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>148</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>149</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>150</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>151</span>      * 下次tick时回调
<span class='line'>152</span>      * @param  {Function} callback
<span class='line'>153</span>      * @return {tickObj}
<span class='line'>154</span>      */</span><span class="WHIT">
<span class='line'>155</span> </span><span class="WHIT">    </span><span class="NAME">nextTick</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">callback</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>156</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">that</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>157</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>158</span> </span><span class="WHIT">            </span><span class="NAME">tick</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">dt</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>159</span> </span><span class="WHIT">                </span><span class="NAME">that.removeTick</span><span class="PUNC">(</span><span class="NAME">tickObj</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>160</span> </span><span class="WHIT">                </span><span class="NAME">callback</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>161</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>162</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>163</span> 
<span class='line'>164</span> </span><span class="WHIT">        </span><span class="NAME">that.addTick</span><span class="PUNC">(</span><span class="NAME">tickObj</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>165</span> </span><span class="WHIT">        </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>166</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>167</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>168</span>      * 延迟指定的时间后调用回调, 类似setTimeout
<span class='line'>169</span>      * @param  {Function} callback
<span class='line'>170</span>      * @param  {Number}   duration 延迟的毫秒数
<span class='line'>171</span>      * @return {tickObj}
<span class='line'>172</span>      */</span><span class="WHIT">
<span class='line'>173</span> </span><span class="WHIT">    </span><span class="NAME">timeout</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">callback</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>174</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">that</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>175</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">targetTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">getTime</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>176</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>177</span> </span><span class="WHIT">            </span><span class="NAME">tick</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>178</span> </span><span class="WHIT">                </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">getTime</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>179</span> </span><span class="WHIT">                </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">dt</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">targetTime</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>180</span> </span><span class="WHIT">                </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">dt</span><span class="WHIT"> </span><span class="PUNC">>=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>181</span> </span><span class="WHIT">                    </span><span class="NAME">that.removeTick</span><span class="PUNC">(</span><span class="NAME">tickObj</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>182</span> </span><span class="WHIT">                    </span><span class="NAME">callback</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>183</span> </span><span class="WHIT">                </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>184</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>185</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>186</span> </span><span class="WHIT">        </span><span class="NAME">that.addTick</span><span class="PUNC">(</span><span class="NAME">tickObj</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>187</span> </span><span class="WHIT">        </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>188</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>189</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>190</span>      * 指定的时间周期来调用函数, 类似setInterval
<span class='line'>191</span>      * @param  {Function} callback
<span class='line'>192</span>      * @param  {Number}   duration 时间周期，单位毫秒
<span class='line'>193</span>      * @return {tickObj}
<span class='line'>194</span>      */</span><span class="WHIT">
<span class='line'>195</span> </span><span class="WHIT">    </span><span class="NAME">interval</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">callback</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>196</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">that</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>197</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">targetTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">getTime</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>198</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>199</span> </span><span class="WHIT">            </span><span class="NAME">tick</span><span class="PUNC">:</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>200</span> </span><span class="WHIT">                </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Date</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">getTime</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>201</span> </span><span class="WHIT">                </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">dt</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">targetTime</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>202</span> </span><span class="WHIT">                </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">dt</span><span class="WHIT"> </span><span class="PUNC">>=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>203</span> </span><span class="WHIT">                    </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">dt</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>204</span> </span><span class="WHIT">                        </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">dt</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>205</span> </span><span class="WHIT">                    </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>206</span> </span><span class="WHIT">                    </span><span class="NAME">targetTime</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">nowTime</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">duration</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>207</span> </span><span class="WHIT">                    </span><span class="NAME">callback</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>208</span> </span><span class="WHIT">                </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>209</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>210</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>211</span> </span><span class="WHIT">        </span><span class="NAME">that.addTick</span><span class="PUNC">(</span><span class="NAME">tickObj</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>212</span> </span><span class="WHIT">        </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">tickObj</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>213</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>214</span> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span></pre></body></html>